=== HTTP code : 200 ===

HTTP/1.1 301 Moved Permanently
Date: Tue, 07 Apr 2015 12:59:49 GMT
Server: gwiseguy/2.0
X-Content-Type-Options: nosniff
Expires: Tue, 27 Apr 1971 19:44:06 EST
Content-Type: text/html; charset=utf-8
Cache-Control: no-cache
P3P: CP="This is not a P3P policy! See http://support.google.com/accounts/answer/151657?hl=en for more info."
Content-Length: 0
Location: https://www.youtube.com/watch?v=4mD1d4MZO1s
X-XSS-Protection: 1; mode=block; report=https://www.google.com/appserve/security-bugs/log/youtube
X-Frame-Options: SAMEORIGIN
Set-Cookie: YSC=ETUxT9PONzs; path=/; domain=.youtube.com; HttpOnly
Set-Cookie: VISITOR_INFO1_LIVE=FX6OpJvHtNY; expires=Mon, 07-Dec-2015 00:52:49 GMT; path=/; domain=.youtube.com; HttpOnly
Alternate-Protocol: 80:quic,p=0.5
Connection: close

HTTP/1.1 200 OK
Date: Tue, 07 Apr 2015 12:59:50 GMT
Server: gwiseguy/2.0
P3P: CP="This is not a P3P policy! See http://support.google.com/accounts/answer/151657?hl=en for more info."
X-Content-Type-Options: nosniff
Expires: Tue, 27 Apr 1971 19:44:06 EST
X-Frame-Options: SAMEORIGIN
Cache-Control: no-cache
Content-Type: text/html; charset=utf-8
X-XSS-Protection: 1; mode=block; report=https://www.google.com/appserve/security-bugs/log/youtube
Set-Cookie: YSC=VOyq7rdbzlU; path=/; domain=.youtube.com; HttpOnly
Set-Cookie: VISITOR_INFO1_LIVE=XngeS6wXzFA; expires=Mon, 07-Dec-2015 00:52:49 GMT; path=/; domain=.youtube.com; HttpOnly
Alternate-Protocol: 443:quic,p=0.5
Accept-Ranges: none
Vary: Accept-Encoding
Connection: close


Link is valid.